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<a name="1" href="#1">1</a>   <em class="comment">/*</em>
<a name="2" href="#2">2</a>   <em class="comment"> * $Header$</em>
<a name="3" href="#3">3</a>   <em class="comment"> * $Revision: 1128 $</em>
<a name="4" href="#4">4</a>   <em class="comment"> * $Date: 2006-02-05 13:49:04 -0800 (Sun, 05 Feb 2006) $</em>
<a name="5" href="#5">5</a>   <em class="comment"> *</em>
<a name="6" href="#6">6</a>   <em class="comment"> * ====================================================================</em>
<a name="7" href="#7">7</a>   <em class="comment"> *</em>
<a name="8" href="#8">8</a>   <em class="comment"> * Copyright 2000-2002 bob mcwhirter &amp; James Strachan.</em>
<a name="9" href="#9">9</a>   <em class="comment"> * All rights reserved.</em>
<a name="10" href="#10">10</a>  <em class="comment"> *</em>
<a name="11" href="#11">11</a>  <em class="comment"> * Redistribution and use in source and binary forms, with or without</em>
<a name="12" href="#12">12</a>  <em class="comment"> * modification, are permitted provided that the following conditions are</em>
<a name="13" href="#13">13</a>  <em class="comment"> * met:</em>
<a name="14" href="#14">14</a>  <em class="comment"> * </em>
<a name="15" href="#15">15</a>  <em class="comment"> *   * Redistributions of source code must retain the above copyright</em>
<a name="16" href="#16">16</a>  <em class="comment"> *     notice, this list of conditions and the following disclaimer.</em>
<a name="17" href="#17">17</a>  <em class="comment"> * </em>
<a name="18" href="#18">18</a>  <em class="comment"> *   * Redistributions in binary form must reproduce the above copyright</em>
<a name="19" href="#19">19</a>  <em class="comment"> *     notice, this list of conditions and the following disclaimer in the</em>
<a name="20" href="#20">20</a>  <em class="comment"> *     documentation and/or other materials provided with the distribution.</em>
<a name="21" href="#21">21</a>  <em class="comment"> * </em>
<a name="22" href="#22">22</a>  <em class="comment"> *   * Neither the name of the Jaxen Project nor the names of its</em>
<a name="23" href="#23">23</a>  <em class="comment"> *     contributors may be used to endorse or promote products derived </em>
<a name="24" href="#24">24</a>  <em class="comment"> *     from this software without specific prior written permission.</em>
<a name="25" href="#25">25</a>  <em class="comment"> * </em>
<a name="26" href="#26">26</a>  <em class="comment"> * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS</em>
<a name="27" href="#27">27</a>  <em class="comment"> * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED</em>
<a name="28" href="#28">28</a>  <em class="comment"> * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A</em>
<a name="29" href="#29">29</a>  <em class="comment"> * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER</em>
<a name="30" href="#30">30</a>  <em class="comment"> * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,</em>
<a name="31" href="#31">31</a>  <em class="comment"> * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,</em>
<a name="32" href="#32">32</a>  <em class="comment"> * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR</em>
<a name="33" href="#33">33</a>  <em class="comment"> * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF</em>
<a name="34" href="#34">34</a>  <em class="comment"> * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING</em>
<a name="35" href="#35">35</a>  <em class="comment"> * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</em>
<a name="36" href="#36">36</a>  <em class="comment"> * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</em>
<a name="37" href="#37">37</a>  <em class="comment"> *</em>
<a name="38" href="#38">38</a>  <em class="comment"> * ====================================================================</em>
<a name="39" href="#39">39</a>  <em class="comment"> * This software consists of voluntary contributions made by many </em>
<a name="40" href="#40">40</a>  <em class="comment"> * individuals on behalf of the Jaxen Project and was originally </em>
<a name="41" href="#41">41</a>  <em class="comment"> * created by bob mcwhirter &lt;bob@werken.com> and </em>
<a name="42" href="#42">42</a>  <em class="comment"> * James Strachan &lt;jstrachan@apache.org>.  For more information on the </em>
<a name="43" href="#43">43</a>  <em class="comment"> * Jaxen Project, please see &lt;<a href="http://www.jaxen.org/" target="alexandria_uri">http://www.jaxen.org/</a>>.</em>
<a name="44" href="#44">44</a>  <em class="comment"> * </em>
<a name="45" href="#45">45</a>  <em class="comment"> * $Id: LocaleFunctionSupport.java 1128 2006-02-05 21:49:04Z elharo $</em>
<a name="46" href="#46">46</a>  <em class="comment"> */</em>
<a name="47" href="#47">47</a>  
<a name="48" href="#48">48</a>  <strong>package</strong> org.jaxen.function.ext;
<a name="49" href="#49">49</a>  
<a name="50" href="#50">50</a>  <strong>import</strong> java.util.List;
<a name="51" href="#51">51</a>  <strong>import</strong> java.util.Locale;
<a name="52" href="#52">52</a>  <strong>import</strong> java.util.StringTokenizer;
<a name="53" href="#53">53</a>  
<a name="54" href="#54">54</a>  <strong>import</strong> org.jaxen.Function;
<a name="55" href="#55">55</a>  <strong>import</strong> org.jaxen.Navigator;
<a name="56" href="#56">56</a>  <strong>import</strong> org.jaxen.function.StringFunction;
<a name="57" href="#57">57</a>  
<a name="58" href="#58">58</a>  <em>/**</em>
<a name="59" href="#59">59</a>  <em> * &lt;p>An abstract base class for Locale-specific extension </em>
<a name="60" href="#60">60</a>  <em> * functions. This class provides convenience methods that</em>
<a name="61" href="#61">61</a>  <em> * can be inherited, specifically to find a Locale from</em>
<a name="62" href="#62">62</a>  <em> * an XPath function argument value.</em>
<a name="63" href="#63">63</a>  <em> * &lt;/p></em>
<a name="64" href="#64">64</a>  <em> *</em>
<a name="65" href="#65">65</a>  <em> * @author &lt;a href="<a href="mailto:jstrachan@apache.org" target="alexandria_uri">mailto:jstrachan@apache.org</a>">James Strachan&lt;/a></em>
<a name="66" href="#66">66</a>  <em> */</em>
<a name="67" href="#67">67</a>  <strong>public</strong> <strong>abstract</strong> <strong>class</strong> <a href="../../../../org/jaxen/function/ext/LocaleFunctionSupport.html">LocaleFunctionSupport</a> implements <a href="../../../../org/jaxen/Function.html">Function</a>
<a name="68" href="#68">68</a>  {
<a name="69" href="#69">69</a>  
<a name="70" href="#70">70</a>      <em>/**</em><em> </em>
<a name="71" href="#71">71</a>  <em>     * Attempts to convert the given function argument value </em>
<a name="72" href="#72">72</a>  <em>     * into a Locale either via casting, extracting it from a List</em>
<a name="73" href="#73">73</a>  <em>     * or looking up the named Locale using reflection.</em>
<a name="74" href="#74">74</a>  <em>     *</em>
<a name="75" href="#75">75</a>  <em>     * @param value is either a Locale, a List containing a Locale</em>
<a name="76" href="#76">76</a>  <em>     *      or a String containing the name of a Locale</em>
<a name="77" href="#77">77</a>  <em>     *      as defined by the Locale static members.</em>
<a name="78" href="#78">78</a>  <em>     *</em>
<a name="79" href="#79">79</a>  <em>     * @return the Locale for the value or null if one could </em>
<a name="80" href="#80">80</a>  <em>     *      not be deduced</em>
<a name="81" href="#81">81</a>  <em>     */</em>
<a name="82" href="#82">82</a>      <strong>protected</strong> Locale getLocale(Object value, <a href="../../../../org/jaxen/Navigator.html">Navigator</a> navigator) 
<a name="83" href="#83">83</a>      {
<a name="84" href="#84">84</a>          <strong>if</strong> (value instanceof Locale)
<a name="85" href="#85">85</a>          {
<a name="86" href="#86">86</a>              <strong>return</strong> (Locale) value;
<a name="87" href="#87">87</a>          }
<a name="88" href="#88">88</a>          <strong>else</strong> <strong>if</strong>(value instanceof List)
<a name="89" href="#89">89</a>          {
<a name="90" href="#90">90</a>              List list = (List) value;
<a name="91" href="#91">91</a>              <strong>if</strong> ( ! list.isEmpty() ) 
<a name="92" href="#92">92</a>              {
<a name="93" href="#93">93</a>                  <strong>return</strong> getLocale( list.get(0), navigator );
<a name="94" href="#94">94</a>              }
<a name="95" href="#95">95</a>          }
<a name="96" href="#96">96</a>          <strong>else</strong> {
<a name="97" href="#97">97</a>              String text = StringFunction.evaluate( value, navigator );
<a name="98" href="#98">98</a>              <strong>if</strong> (text != <strong>null</strong> &amp;&amp; text.length() > 0) 
<a name="99" href="#99">99</a>              {
<a name="100" href="#100">100</a>                 <strong>return</strong> findLocale( text );
<a name="101" href="#101">101</a>             }
<a name="102" href="#102">102</a>         }
<a name="103" href="#103">103</a>         <strong>return</strong> <strong>null</strong>;
<a name="104" href="#104">104</a>     }
<a name="105" href="#105">105</a>     
<a name="106" href="#106">106</a>     <em>/**</em><em> </em>
<a name="107" href="#107">107</a> <em>     * Tries to find a Locale instance by name using </em>
<a name="108" href="#108">108</a> <em>     * &lt;a href="<a href="http://www.ietf.org/rfc/rfc3066.txt" target="alexandria_uri">http://www.ietf.org/rfc/rfc3066.txt</a>" target="_top">RFC 3066&lt;/a></em>
<a name="109" href="#109">109</a> <em>     * language tags such as 'en', 'en-US', 'en-US-Brooklyn'.</em>
<a name="110" href="#110">110</a> <em>     *</em>
<a name="111" href="#111">111</a> <em>     * @param localeText the RFC 3066 language tag</em>
<a name="112" href="#112">112</a> <em>     * @return the locale for the given text or null if one could not</em>
<a name="113" href="#113">113</a> <em>     *      be found </em>
<a name="114" href="#114">114</a> <em>     */</em>
<a name="115" href="#115">115</a>     <strong>protected</strong> Locale findLocale(String localeText) {
<a name="116" href="#116">116</a>         StringTokenizer tokens = <strong>new</strong> StringTokenizer( localeText, <span class="string">"-"</span> );
<a name="117" href="#117">117</a>         <strong>if</strong> (tokens.hasMoreTokens())
<a name="118" href="#118">118</a>         {
<a name="119" href="#119">119</a>             String language = tokens.nextToken();
<a name="120" href="#120">120</a>             <strong>if</strong> (! tokens.hasMoreTokens())
<a name="121" href="#121">121</a>             {                
<a name="122" href="#122">122</a>                 <strong>return</strong> findLocaleForLanguage(language);
<a name="123" href="#123">123</a>             }
<a name="124" href="#124">124</a>             <strong>else</strong> 
<a name="125" href="#125">125</a>             {
<a name="126" href="#126">126</a>                 String country = tokens.nextToken();
<a name="127" href="#127">127</a>                 <strong>if</strong> (! tokens.hasMoreTokens())
<a name="128" href="#128">128</a>                 {
<a name="129" href="#129">129</a>                     <strong>return</strong> <strong>new</strong> Locale(language, country);
<a name="130" href="#130">130</a>                 }
<a name="131" href="#131">131</a>                 <strong>else</strong> 
<a name="132" href="#132">132</a>                 {
<a name="133" href="#133">133</a>                     String variant = tokens.nextToken();
<a name="134" href="#134">134</a>                     <strong>return</strong> <strong>new</strong> Locale(language, country, variant);
<a name="135" href="#135">135</a>                 }
<a name="136" href="#136">136</a>             }
<a name="137" href="#137">137</a>         }
<a name="138" href="#138">138</a>         <strong>return</strong> <strong>null</strong>;
<a name="139" href="#139">139</a>     }
<a name="140" href="#140">140</a>     
<a name="141" href="#141">141</a>     <em>/**</em><em> </em>
<a name="142" href="#142">142</a> <em>     * Finds the locale with the given language name with no country</em>
<a name="143" href="#143">143</a> <em>     * or variant, such as Locale.ENGLISH or Locale.FRENCH</em>
<a name="144" href="#144">144</a> <em>     *</em>
<a name="145" href="#145">145</a> <em>     * @param language the language code to look for</em>
<a name="146" href="#146">146</a> <em>     * @return the locale for the given language or null if one could not</em>
<a name="147" href="#147">147</a> <em>     *      be found </em>
<a name="148" href="#148">148</a> <em>     */</em>
<a name="149" href="#149">149</a>     <strong>protected</strong> Locale findLocaleForLanguage(String language) {
<a name="150" href="#150">150</a>         Locale[] locales = Locale.getAvailableLocales();
<a name="151" href="#151">151</a>         <strong>for</strong> ( <strong>int</strong> i = 0, size = locales.length; i &lt; size; i++ ) 
<a name="152" href="#152">152</a>         {
<a name="153" href="#153">153</a>             Locale locale = locales[i];
<a name="154" href="#154">154</a>             <strong>if</strong> ( language.equals( locale.getLanguage() ) ) 
<a name="155" href="#155">155</a>             {
<a name="156" href="#156">156</a>                 String country = locale.getCountry();
<a name="157" href="#157">157</a>                 <strong>if</strong> ( country == <strong>null</strong> || country.length() == 0 ) 
<a name="158" href="#158">158</a>                 {
<a name="159" href="#159">159</a>                     String variant = locale.getVariant();
<a name="160" href="#160">160</a>                     <strong>if</strong> ( variant == <strong>null</strong> || variant.length() == 0 ) 
<a name="161" href="#161">161</a>                     {
<a name="162" href="#162">162</a>                         <strong>return</strong> locale;
<a name="163" href="#163">163</a>                     }
<a name="164" href="#164">164</a>                 }
<a name="165" href="#165">165</a>             }
<a name="166" href="#166">166</a>         }    
<a name="167" href="#167">167</a>         <strong>return</strong> <strong>null</strong>;
<a name="168" href="#168">168</a>     }
<a name="169" href="#169">169</a> }
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